Milk-bottle cap



Jan. 18, BAUM MILK BOTTLE CAP Filed Feb. 5 1923 Puma Jan. 18,1927.

UNITED STATES PATENT OFFICE.

EWALD G. BAUM, OF NATICK, MASSACHUSETTS, ASSIGNOR TO SEAL-m COMPANY, OFNATIOK, MASSACHUSETTS, A CORPORATION OF MASSACHUSETTS.

MILK-BOTTLE CAP.

Application filed February 5, 1928. Serial No. 618,874.

This invention relates to caps more particularly designed for closingmilk bottles and has for one of its objects the provision of a cap whichma be sealed against the usual shoulder of t e bottle on which thecardboard disk is commonly seated, againstthe wall of the bottle neckimmediately above this shoulder and also extend over the edge of andbelow the shoulder without the loss of milk in case the bottle isinitially filled level with the shoulder.

A further feature of the invention relates to means for maintaining thecap sealed in a secure manner, the cap and sealing member formin ineffect a truss structure which offers consi erable resistance to thedeformation necessary to effect removal of the cap from the bottle.

For a more complete understandin of this invention together with furtherob ects and advantageous details and combinations of parts, referencemay be had to the accompanying drawings in which Figure 1 is a top planof a cap as applied to a bottle.

Figure 2 is a fragmentary section on line 2-2 of Figure 1.

Fi re 3 is an inverted plan of the cap. detac ed.

Figures 4, 5, and 6 are views similar to Figures 1, 2, and 3,respectively, except that the bottle islnot shown, Figure 5 being asection on line 5-5 of Figure 4.

Figures 7, 8, and 9 are views similar to Figures 4,5, and 6,respectively, showing the sealing means applied to a difl'erent form ofcap, Figpre 8 being a section on line 8--8 of Figure Figure 10 is atransverse section through a further modified form of cap. vReferring tothe form shown in Figures 1, 2, and 3, the cap C comprises an annularpouring lip housing portion 1 which is shown as corrugated over theupper edge of the bottle mouth. Immediately within this pouring liphousing is an annular shoulder portion 2 which is arranged to be seatedon the annular ledge 3 of the bottle on which the disk of cardboardcommonly used for closin the bottles may be seated. Beneath the le ge 3the bore of the bottle is flared outwardl for a short distance as shownat 4. At 8 1s shown a bore-covering portion of the cap which isconnected to the shoulder portion 2 by means of an annular corrugawoulddisplace some of the contents. For

this reason the bore-closing portion within the corrugation is raisedslightly above the level of the shoulder 2 so as to afford a space intowhich the contents so displaced may flow so that in forcing the cap onthe bottle none of'the contents is forced out from beneath the cap andlost. As the corrugation 9 bears over the inner edge of the bottle ledge3 it permits a more ellicient seal to be effected therewith than ifcontact were only against the upper face of -this ledge.

Further in order to hold the cap securely in position a disk 10 may beforced downwardly within the pouring lip housing its perimeter restingagainst and forcing outwardly the inner wall of the pouring lip housing,the bottle pouring lip at this point flaring downwardly and outwardly.This disk is preferably forced to a position within the pouring liphousing and then its edge and the inner face of the housing spreadoutwardly. against the inner face of the pouring lip by a suitable die.When the disk is finally in its position, its central porton bearsagainst the upper face of the cap withinthe corrugation 9 and its edgemay be, though not necessarily, slightly upwardly bent to engfge firmlywithin the lip housing.

This dis bearing on the upstanding por- 'tion of the pouring lip housingmaintains it in sealing contact with the wall of the bottle mouth.

In Figures 4, 5, and 6 a preferred construction of cap is shown in whichthe pouring lip housing 1 is constructed as before as well as theshoulder 2 which engages on the bottle ledge. Instead of the corrugation9, however, the bore-covering portion is bent downwardly over the bottleshoulder as at 12-and then is formed in substantially cone shape, thecentral portion thereof being flat as at 13 and raised upwardly abovethe level of the lower face of the shoulder 2 sufficiently to permitliquid displaced by the portion 12 when the cap is placed in position toflow therebeneath so as not to'be forced out of the bottle. With thisform also a disk 10 may be forced within the housing 1, its centralportion resting on the fiat top 13 of the bore-covering portion and itsedge engaging the inner wall of the pour-' ing lip housing. With thisconstruction, since the portion 13 is raised upwardly above the portion2, the disk 10 when in position is domed or upwardly convexed or dishedat its center but to a less extent than the and 12. This causes a trusse ect to be produced .between the sealing disk and the cap, as may beseen clearly in Figure 5,

which is very resistant to deformation so that the cap is very securelyheld in position. In this case also the marginal portion of the disk 10may be slightly upwardly turned by its engagement wvith the pouring liphousing.

In Figures 7, 8 and 9 the sealing disk 10 is shown as applied to a capof the form shown in my reissued patent- N 0. 15,491 dated November 21,1922. In this case, however, the bore-covering portion is mamtained inits upwardly dished form after it has been sealed on the bottle insteadof somewhat downwardly dished as shown in that patent. These figures aremerely used to show the application of the sealing disk 10 to this typeof cap by which a tighter sealing engagement of the cap to the bottlemay be effected. In this form as well as in the forms shown in Figures 1to 6 the disk presents a substantially flat upper surface on whichprinting or advertising matter may be ap lied. In igure 10 is shownstill another modification, in which the annular corrugations 9 shown inFigures 1, 2, and 3 are utilized together with the conical bore-coveringportion illustrated in Figure 5. In this case, however, thebore-covering portion shown at .15 is less prqnouncedlyconical than in'the "form shown in Figure 5 since a certain part of the axial dimensionsof the cone are taken up by the corrugation. .This type of cap also maybe sealed by forcing a flat disk 10 into position against the center ofthe upper face of the bore-covering portion and engaging and forcingoutwardly the inner wall of the pouring lip housing, a truss construe--ments of this' inventionit should be evident to those skilled in the artthat various modifications and changes may be made therein withoutdeparting from its s irit or scope as defined by the appended c aims.

I claim:

1. A bottle cap for a bottle having an internal annular ledge below itsto which comprises a bore-covering portion iia part adjacent its marginarranged to'overlic the inner edge of the ledge and project therebelowwithin said ledge and havin its central part projecting above said lege.

2. A bottle cap for a bottle having an im ternal annular ledge below itstop, which comprises a bore-covering portion aving -a part adjacent toits margin arranged to overlie the inner edge of the ledge and projecttherebelow within said ledge, and having its central part projectingabove said ledge and ving a provided at said margin with an upwardlyextending pouring lip housing engaging over the upper edge of the bottlemouth,

3. A bottle cap having an upwardly convex bore-covering portion, anannular upstanding marginal portion terminating in a pouring liphousing, and a disk engaging at its periphery within said upstandingportion to maintain said upstanding portion in sealing contact with thewall of the bottle month, said disk being incontact with the upper faceof said bore-covering portion only at its center.

4. A bottle cap having an upwardly conveited bore-covering portion,annular mar-' ginal portions upstanding from said bore-- coveringportion, and a disk having its central portion engaging the upper faceof the central portion of said bore-covering portion and its peripheryengaging with said upstanding marginal portion, whereby said upstandingportion is maintained in sealing contact with the wall of the bottlemouth,

said disk and bore-covering portions being spaced apart intermediatesaid central por- I tion and the periphery of said disk.

In testimony whereof I have afiixed my signature.

EWALD G. BAUM.

